New Delhi, July 5 -- The market regulator on Friday barred four entities of US-headquartered Jane Street Group from accessing the securities market until they deposit alleged illegal gains into an escrow account, rattling shares of capital market-related companies and the broader financial services sector.

In one of the biggest crackdowns in India's equity market, the Securities and Exchange Board of India (Sebi) ordered seizing Rs.4,843 crore from the group, one of the most influential players in the global derivatives markets, citing prima facie evidence of index manipulation and fraudulent trading practices.

The Sebi interim order also froze the bank and demat accounts of the four entities, and directed all custodians, banks, deposit...